MERN Full Stack Developer
Senior MERN full-stack contractor to maintain and support the Government of Ontario's Ceres plant-health application (MongoDB, Express, React, Node.js, hosted on Azure) — resolving issues, bug fixes, stack upgrades, and documentation. Onsite in Toronto via Cleo Consulting; fixed-term assignment Jan 5 – Mar 31, 2026.
- Compensation
- Not disclosed
- Location
- Toronto, Canada
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 4+ years
- Category
- Fullstack
- Posted
Skills
Must have
- 7+ years full-stack developer experience with the MERN (MongoDB, Express, React, Node.js) stack
- 4+ years developing and documenting build books for managing build and deployment of application releases
- Technical documentation skills to ensure documentation is updated for knowledge transfer
- Experience designing and delivering solutions incorporating AODA (Accessibility for Ontarians with Disabilities Act)
- Experience working in an Agile software delivery environment
- Knowledge of IT security best practices and protocols (OAuth 2, SAML)
Nice to have
- Ability to work independently and closely with other developers, especially for system integration
- Professional team player with ability to collaborate with project team members
- Analytical and problem-solving skills
- Attention to detail
- Strong communication skills
- Experience building and deploying cloud native solutions, ideally in Azure
- Experience working on agricultural data collection and analysis applications
- Familiarity with Government of Ontario Information and Technology Standards (GO-ITS)
- Experience in source control, DevOps, CI/CD, and related tools (Azure DevOps, Git)
Full description
Job Description
Job DescriptionMinistry: Ministry of Public and Business Service Delivery and ProcurementOrganization: Land & Resources ClusterAssignment: RQ09981 - Software Developer - Full Stack - SeniorTitle; Software Developer - Full StackStart Date: 2026-01-05End Date: 2026-03-31Office Location: 40 St. Claire W, Toronto# Business Days: 58.00“This position is listed as "Onsite"; the resource is expected to work 7.25 hours per calendar day between the standard wording hours of 8:00 AM and 5:00 PM (excluding lunch breaks) every Monday to Friday inclusive.Must have:
- 7+ years full-stack developer experience, working with the specific MERN (MongoDB, Express, React, Node.js) technology stack.
- 4+ years developing and documenting build books for managing build and deployment of application releases
- Experience working in an Agile software delivery environment
Experience and Skill Set Requirements Evaluation Criteria Evaluation % Weightage
Mandatory Skills and Experience
70%
Desirable Skills and Experience
20%
Soft Skills and Experience
10%
TOTAL
100%
Description
To respond to the priorities of the Government of Ontario through the passage of the Bill 5, Protect Ontario by Unleashing Our Economy Act 2025, the resource may be partially assigned to Bill 5 related projects or initiatives on an as needed basis.
Background:
- This Ceres application was launched in February 2023 for ministry users, to improve management of plant health data and enable timely access to critical information (present and historical), as well as efficient identification of pest threats. The requirement is to make sure that the CERES application is continuously available, while also enabling implementation of bug fixes, issue resolution or minor improvements, based on user feedback.
- We are looking for a senior full stack software developer who will be responsible for providing maintenance and support for the Ceres application. The Ceres application is built using MERN (MongoDB, Express, React, Node.js) technology stack and hosted on Azure OPS tenant. The work activities for Ceres Maintenance and Support will entail:
- Responding to and resolving any issues reported on the application and ensuring that the application is continuously available for use
- Identifying and prioritizing technical upgrades to keep the platform up to date, including upgrades to the components in the technology stack
- Bug Fixes and Improvements identified regarding the functionality of the application